The customer informed siemens on (b)(6) 2014 of permanent equipment failure (mode intlk).The customer service engineer arrived on site and noticed a burning smell in the room and black soot was noticed on the covers.Reportedly, the linac starts by timer 7 days a week but no treatment was scheduled for that sunday.There appeared to have been a short on +24/-24v and the g41 tb1 connector melted in the process.As the gantry was parked at 270 degrees, liquid plastic flowed downward and seems to have caused a fire on the g41 head driver pcb.However, the damage was localized.There was no mistreatment or injury to a patient or facility personnel.This reported issue occurred in (b)(6).
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